TALC n.
te of magnesia. Steatite, or soapstone, is a compact granular variety. Indurated talc, an impure, slaty talc, with a nearly compact texture, and greater hardness than common talc; -- called also talc slate.
YELLOW a.
he jurel. -- Yellow metal. Same as Muntz metal, under Metal. -- Yellow ocher (Min.), an impure, earthy variety of brown iron ore, which is used as a pigment. -- Yellow oxeye (Bot.), a yellow-flowered plant (Chrysanthemum segetum) closely related to the oxeye daisy. -- Yellow perch (Zoöl.), the common American perch…
ZAFFER n.
with sand or quartz, as a dark earthy powder. It consists of crude cobalt oxide, or of an impure cobalt arseniate. It is used in porcelain painting, and in enameling pottery, to produce a blue color, and is often confounded with smalt, from which, however, it is distinct, as it contains no potash. The name is often loo…
ZINC n.
zinc is burned; -- called also flowers of zinc, philosopher's wool, nihil album, etc. The impure oxide produced by burning the metal, roasting its ores, or in melting brass, is called also pompholyx, and tutty. -- Zinc spinel (Min.), a mineral, related to spinel, consisting essentially of the oxides of zinc and alumin…